internal/

Package app is the composition root for notifycat.

Package cleanup runs the scheduled, in-process pruning of stale rows from the slack_messages table.

Package config loads runtime configuration from environment variables (and optionally from a .env file in development).

Package doctor runs end-to-end preflight diagnostics for a notifycat installation.

Package github is a minimal GitHub API client covering only the endpoints notifycat needs for validation.

Package githubhook authenticates and parses inbound GitHub webhook requests.

Package mappings owns the declarative repository → Slack-channel configuration: parsing mappings.yaml, the in-memory Provider used at runtime, and the mappings.lock cache that records which entries have been validated.

Package pullrequest holds the domain model for GitHub pull-request events and the handlers that update Slack in response.

Package slack talks to the Slack Web API for the PR notifier: posting, updating, and deleting messages, adding emoji reactions, and composing the text of the notification.

Package store owns the database schema, GORM models, repositories, and the goose-driven migration runner.

Package validate verifies that a repository → Slack-channel mapping is usable end-to-end before GitHub fires a real PR event: the mapping row exists, the channel ID is well-formed, the Slack bot has the right scopes and is a member of the channel, and (when GitHub credentials are available) the webhook is subscribed to the events notifycat needs.